public class Flow {

	public static void main(String[] args) {
		
		int i = 5;
		
		if(i < 10) {
			System.out.println("i is less than 10");
		}
		
		if(i > 20) {
		
			System.out.println("i is greater than 20");
		}
		
		System.out.println("i is " + i);
		int age = 55;
		if (age >= 18) {
			System.out.println("You can 成年,可以工作了!");
		} else {
			System.out.println("You can not 成年,不可以工作了!");
		}

		int age2 = 5;
		if (age2 >= 18 && age2 <= 30) {
			System.out.println("You are 年青人!");
		} else if (age2>=30 && age2<=50) {
			System.out.println("You are 中年人!");
		}
		else if (age2>=50) {
			System.out.println("You are old 老年人!");
		} else{
			System.out.println("You are baby 少年!");
		}
	}
	}
